Desktop Motherboard Power System: open circuit or connection. A pin, trace, socket or component no longer carries its required signal.

The distinguishing clue

One rail or channel is absent while neighbouring stages work.

Checks before an assessment

Describe no response, brief fan movement or repeated restarts separately. Do not open the PSU, bridge pins or reuse uncertain modular power cables.

Stop point: Power must be disconnected before moving cards or board connectors.

Workshop confirmation and repair

Device-level check: Compare a known power supply, inspect connectors and trace the board power sequence.

Targeted check: Trace continuity and signal progression with power isolated where required. If confirmed: Repair the open path and its mechanical or thermal cause.

Repair boundary: Repair the confirmed connector, regulator, rail or downstream short.

Related cause to rule out

When the fault changes with temperature or chassis flex, also consider Desktop Motherboard Power System: intermittent solder joint before choosing a repair.

Checks after the work

After repair or replacement, check cold start, processor load, graphics load, standby and shutdown.

For an AEPC repair assessment in East Auckland, provide the exact model and observed clue. Call 027 908 8880 before visiting the Burswood workshop.